// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/renderer/render_widget_mouse_lock_dispatcher.h"

#include "content/common/view_messages.h"
#include "content/renderer/render_view_impl.h"
#include "ipc/ipc_message.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "third_party/WebKit/public/web/WebWidget.h"

using blink::WebUserGestureIndicator;

namespace content {

RenderWidgetMouseLockDispatcher::RenderWidgetMouseLockDispatcher(
    RenderWidget* render_widget)
    : render_widget_(render_widget)
{
}

RenderWidgetMouseLockDispatcher::~RenderWidgetMouseLockDispatcher() { }

void RenderWidgetMouseLockDispatcher::SendLockMouseRequest(
    bool unlocked_by_target)
{
    bool user_gesture = WebUserGestureIndicator::isProcessingUserGesture();

    render_widget_->Send(new ViewHostMsg_LockMouse(
        render_widget_->routing_id(), user_gesture, unlocked_by_target, false));
}

void RenderWidgetMouseLockDispatcher::SendUnlockMouseRequest()
{
    render_widget_->Send(
        new ViewHostMsg_UnlockMouse(render_widget_->routing_id()));
}

bool RenderWidgetMouseLockDispatcher::OnMessageReceived(
    const IPC::Message& message)
{
    bool handled = true;
    IPC_BEGIN_MESSAGE_MAP(RenderWidgetMouseLockDispatcher, message)
    IPC_MESSAGE_HANDLER(ViewMsg_LockMouse_ACK, OnLockMouseACK)
    IPC_MESSAGE_FORWARD(ViewMsg_MouseLockLost,
        static_cast<MouseLockDispatcher*>(this),
        MouseLockDispatcher::OnMouseLockLost)
    IPC_MESSAGE_UNHANDLED(handled = false)
    IPC_END_MESSAGE_MAP()
    return handled;
}

void RenderWidgetMouseLockDispatcher::OnLockMouseACK(bool succeeded)
{
    // Notify the base class.
    MouseLockDispatcher::OnLockMouseACK(succeeded);

    // Mouse Lock removes the system cursor and provides all mouse motion as
    // .movementX/Y values on events all sent to a fixed target. This requires
    // content to specifically request the mode to be entered.
    // Mouse Capture is implicitly given for the duration of a drag event, and
    // sends all mouse events to the initial target of the drag.
    // If Lock is entered it supercedes any in progress Capture.
    if (succeeded && render_widget_->GetWebWidget())
        render_widget_->GetWebWidget()->mouseCaptureLost();
}

} // namespace content
